54 25-Seven Program Delay Manager
Version 2.3 Manual April 2013
Basic remote readout
1) Use the connections shown on the right side of the schematic. At the DB-25, con-
nect pin 7 (output common) to pin 20 (PDM ground).
2) Connect a 4.7 k
1/4 watt resistor between pin 8 (+5 V) and the anode or + lead of
an LED; connect the cathode or – lead of the LED to pin 19 (output 1).
3) Add up to 7 more resistor-and-LED combinations as needed, using pin 8 as the
common voltage supply and connecting the LEDs cathodes to individual outputs in
the chart below.
Connecting to external logic or relay circuits:
PDM’s GPIO inputs and outputs are isolated from its power supply and ground, and
can be connected to external logic circuits or the power supplies in remote equipment:
•
Inputs require at least 6 mA flowing from the input common (pin 1) and the
individual input circuit pin.
•
Outputs can carry up to 50 mA, up to 30 V DC per channel, between the indi-
vidual output circuit pin and output common (pin 7).
GPIO Pinouts
PIN
SIGNAL
PIN
SIGNAL
1
NC
14
NC
2
Ground
15
NC
3
Output 8
16
Output 7
4
Output 6
17
Output 5
5
Output 4
18
Output 3
6
Output 2
19
Output 1
7
Output Common
20
Ground
8
+5 VDC
21
NC
9
Input 8
22
Input 7
10
Input 6
23
Input 5
11
Input 4
24
Input 3
12
Input 2
25
Input 1
13
Input Common
NC — No internal connection
Serial Port
RS-232
The RS-232 pins are configured as a computer DTE port, similar to the Comm 1 jack on
desktop computers.
Содержание program delay manager
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